fastness vs foxhole

fastness

noun
  • A fortified or secure place; a fortress, a stronghold. 

  • The ability of a dye to withstand fading. 

  • The quality or state of moving quickly; quickness, rapidity, swiftness. 

  • Something used to fasten or tie; a fastener or fastening. 

  • The quality or state of being strongly attached; firmness, secureness, tenacity. 

  • The quality or state of having an extravagant lifestyle or immoral habits. 

foxhole

noun
  • A small pit dug into the ground as a shelter for protection against enemy fire. 

  • The burrow in the ground where a fox lives. 

verb
  • To dig a military foxhole into, or convert into a foxhole by digging. 

  • To drive into a military foxhole. 

How often have the words fastness and foxhole occurred in a corpus of books? (source: Google Ngram Viewer )